Question

The atomic number of the element having maximum number of unpaired 3p electrons is (in ground state) :

• A. 15
• B. 10
• C. 12
• D. 8

Answer 1

Answer: (A)

15

The atomic number of the element having maximum number of unpaired 3p electrons (in ground state) is 3. The maximum number of unpaired 3p electrons is 3. Hence, the electronic configuration becomes $1s^{2}2s^{2}2p^{6}3s^{2}3p^3$. Hence, the atomic number is $2+2+6+2+3=15$.